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High temperature ReCOB piezocrystals: Recent developments

Journal Article


Abstract


  • Piezoelectric sensors for high temperature applications have attracted attention due to their simplistic structure, fast response time and ease of integration. In this article, oxyborate ReCa4O(BO3) 3 (Re: rare earth element; abbreviated as ReCOB) piezoelectric crystals were surveyed for their potential use in high temperature sensing applications. In contrast to quartz and GaPO4 crystals, no phase transformation(s) are observed prior to their melting points, being in the order of ∼1500 °C. The electrical resistivity, dielectric, piezoelectric properties and resonance-impedance characteristics were studied as a function of temperature over the range of Room Temperature (RT) to 950 °C. The resistivity of ReCOB was found to be ∼2×108 Ohm cm at 800 °C, two orders higher than langasite, another widely studied crystal system. The electromechanical coupling factors k26 and piezoelectric coefficients d26 were found to be >20% and >10 pC/N, respectively, with the variation being <20% over the studied temperature range. The resonance frequency for width shear vibration was found to decrease linearly with increasing temperature for YCOB crystals, with the Temperature Coefficient of Frequency (TCF) in the order of 70 ppm/K, while for NdCOB crystals, a nonlinear behavior was observed, demonstrating a potential zero TCF crystal cut. The high resistivity, high piezoelectric properties and low mechanical and dielectric losses, together with temperature independent characteristics, demonstrate that oxyborate crystals are promising candidates for high temperature sensing applications. © 2010 Elsevier B.V. All rights reserved.

UOW Authors


  •   Zhang, Shujun
  •   Yu, Fapeng (external author)
  •   Xia, Ru (external author)
  •   Fei, Yiting (external author)
  •   Frantz, Eric (external author)
  •   Zhao, Xian (external author)
  •   Yuan, Durong (external author)
  •   Chai, Bruce H. T. (external author)
  •   Snyder, David (external author)
  •   Shrout, Thomas R. (external author)

Publication Date


  • 2011

Citation


  • Zhang, S., Yu, F., Xia, R., Fei, Y., Frantz, E., Zhao, X., Yuan, D., Chai, B. H. T., Snyder, D. & Shrout, T. R. (2011). High temperature ReCOB piezocrystals: Recent developments. Journal of Crystal Growth, 318 884-889. Journal of Crystal Growth

Scopus Eid


  • 2-s2.0-79952736148

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2088

Has Global Citation Frequency


Number Of Pages


  • 5

Start Page


  • 884

End Page


  • 889

Volume


  • 318

Place Of Publication


  • Netherlands

Abstract


  • Piezoelectric sensors for high temperature applications have attracted attention due to their simplistic structure, fast response time and ease of integration. In this article, oxyborate ReCa4O(BO3) 3 (Re: rare earth element; abbreviated as ReCOB) piezoelectric crystals were surveyed for their potential use in high temperature sensing applications. In contrast to quartz and GaPO4 crystals, no phase transformation(s) are observed prior to their melting points, being in the order of ∼1500 °C. The electrical resistivity, dielectric, piezoelectric properties and resonance-impedance characteristics were studied as a function of temperature over the range of Room Temperature (RT) to 950 °C. The resistivity of ReCOB was found to be ∼2×108 Ohm cm at 800 °C, two orders higher than langasite, another widely studied crystal system. The electromechanical coupling factors k26 and piezoelectric coefficients d26 were found to be >20% and >10 pC/N, respectively, with the variation being <20% over the studied temperature range. The resonance frequency for width shear vibration was found to decrease linearly with increasing temperature for YCOB crystals, with the Temperature Coefficient of Frequency (TCF) in the order of 70 ppm/K, while for NdCOB crystals, a nonlinear behavior was observed, demonstrating a potential zero TCF crystal cut. The high resistivity, high piezoelectric properties and low mechanical and dielectric losses, together with temperature independent characteristics, demonstrate that oxyborate crystals are promising candidates for high temperature sensing applications. © 2010 Elsevier B.V. All rights reserved.

UOW Authors


  •   Zhang, Shujun
  •   Yu, Fapeng (external author)
  •   Xia, Ru (external author)
  •   Fei, Yiting (external author)
  •   Frantz, Eric (external author)
  •   Zhao, Xian (external author)
  •   Yuan, Durong (external author)
  •   Chai, Bruce H. T. (external author)
  •   Snyder, David (external author)
  •   Shrout, Thomas R. (external author)

Publication Date


  • 2011

Citation


  • Zhang, S., Yu, F., Xia, R., Fei, Y., Frantz, E., Zhao, X., Yuan, D., Chai, B. H. T., Snyder, D. & Shrout, T. R. (2011). High temperature ReCOB piezocrystals: Recent developments. Journal of Crystal Growth, 318 884-889. Journal of Crystal Growth

Scopus Eid


  • 2-s2.0-79952736148

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2088

Has Global Citation Frequency


Number Of Pages


  • 5

Start Page


  • 884

End Page


  • 889

Volume


  • 318

Place Of Publication


  • Netherlands